Covalently-linked complexes of hiv tat and env proteins

A - Human Necessities – 61 – K

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A61K 39/21 (2006.01) C07K 14/16 (2006.01)

Patent

CA 2647544

Complexes of HIV Env and Tat proteins are advantageous as immunogens compared to Tat or Env alone, but they may dissociate when combined with a vaccine adjuvant. To avoid dissociation, complexes of Env and Tat are stabilized by the use of covalent cross linking. The extent of cross linking is important to the binding properties of the complexes, and so is controlled to avoid the loss of Env's ability to bind specifically to CD4 and Tat's ability to bind specifically to anti-Tat monoclonal antibodies.

Les complexes de protéines Env et Tat du VIH faisant l'objet de cette invention sont avantageux en tant qu'immunogènes par comparaison avec les protéines Tat ou Env utilisées seules mais ils peuvent se dissocier lorsqu'ils sont combinés avec un adjuvant de vaccin. Pour éviter la dissociation, les complexes de Env et Tat sont stabilisés au moyen d'une réticulation covalente. L'ampleur de la réticulation est importante pour les propriétés de liaison des complexes, et elle est modulée de manière à éviter la perte de la capacité de Env à se lier spécifiquement à CD4 et la perte de la capacité de Tat à se lier spécifiquement à des anticorps monoclonaux anti-Tat.

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